Deglucosylation of zearalenone-14-glucoside in animals and human liver leads to underestimation of exposure to zearalenone in humans.

Deglucosylation of zearalenone-14-glucoside in animals and human liver leads to underestimation of exposure to zearalenone in humans. Arch Toxicol. 2018 Jul 17;: Authors: Yang S, Zhang H, Zhang J, Li Y, Jin Y, Zhang S, De Saeger S, Li Y, Zhou J, Sun F, De Boevre M Abstract Zearalenone-14-glucoside (ZEN-14G), the modified mycotoxin of zearalenone (ZEN), has attracted considerable attention due to its high potential to be hydrolyzed into ZEN, which would exert toxicity. It has been confirmed that the microflora could metabolize ZEN-14G to ZEN. However, the metabolic profile of ZEN-14G and whether it could be deglucosidated in the liver are unknown. To thoroughly investigate the metabolism of ZEN-14G, in vitro metabolism including phase I and phase II metabolism was studied using liquid chromatography coupled to high-resolution mass spectrometry. Additionally, in vivo metabolism of ZEN-14G was conducted in model animals, rats, by oral administration. As a result, 29 phase I metabolites and 6 phase II metabolites were identified and significant inter-species metabolic differences were observed as well. What is more, ZEN-14G could be considerably deglucosidated into its free form of ZEN after the incubation with animals and human liver microsomes in the absence of NADPH, which was mainly metabolized by human carboxylesterase CES-I and II. Furthermore, results showed that the major metabolic pathways of ZEN-14G were deglucosylation, hydrox...
Source: Archives of Toxicology - Category: Toxicology Authors: Tags: Arch Toxicol Source Type: research